Rolls for forming horseshoe-bars



NITED STATES I PATENT OFFICE.

EMANUEL BUMFORD, OF COLUMBUS, OHIO.

ROLLS FOR FORIVIING HORSESHOE-BARS.

SPECIFICATION forming'` part 0f Letters Patent No. 624,433, dated May 2, 1899.

Application led August 30, 1898. Serial No. 689,844. (No modell To @ZZ whom, t may concer-71,:

.Be it known that I, EMANUEL BUMFORD, a citizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Rolls for Forming Horseshoe-Bars Having Calks; and I do hereby dcclare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to rolls for forming horseshoe-bars having oalks.

The object of the present invention is the provision of rolls of novel form for producing horseshoe-bars having toe-calks, whereby a finished bar of superior construction can be Obtained after a small number of rollings.

The rolls are provided with a series of'T- passes, decreasing in size in consecutive order beginning with the receiving-pass, and a iinishing-pass in which the bar is flattened and slightly beveled simultaneously with the formation of the calks thereon, as more fully set forth hereinafter.

' In the accompanying drawings, Figure l is a front view of the rolls; Fig. 2, a cross-section taken through the upper roll on line ma; of Fig. l, showing the calli-forming pockets or recesses; Fig.- 3, a detail longitudinal section ofthe upper and lower rolls; Fig. 4, a per?.

spective detail of the bar as it appears after going through the T-passes, and- Fig. 5 detail views of the finished bar.

The numerals l and 2 represent the upper and lower rolls,` respectively, lwhich have T- passes 3, 4, and 5 and a finishing-pass 6,-all of which are formed by collars on the upper rollfittin g in the grooves or passes in thelower roll. The pass 3, which initially receives the bar to be rolled, is the largest, the passes 4 and 5 are neXt in point of size in the order given, and the nishing-'pass is the smallest of all. The collar 7 on the upper roll, that fits in the finishing-pass, has two diametricallydisposed recesses or pockets 8, which are located exactly at the center of the pass and are adapted for forming the cal ks on the cen-` tral longitudinal axis of the bar as it is being finished.

Referring to Fig. 3, it will be Observed that the right-hand half of the finishingpass 6 of Vof it and prevents any touching of the soft part of the hoof by the shoe.

The bar is first' run through the. passes 3 4 5 in the order given, during which operations it is reduced three times, and when emerging from pass 5 it appears as in Fig. 4, being then provided with the" central longitudinal rib 9 and of proper shape and size to enter the finishing-pass. When going through the finishing-pass, the collar 7 iiattens out all portions of the rib 9 on the bar except such as come opposite the calli-forming pockets or recesses. Those pockets leave portions of the rib standing and shape them into calks. Simultaneously with the forming of the calk the bar is reduced and tapered at one side, and when it emerges from the pass it is complete and ready for bending by suitable means. A sufficient length of bar to constitute two complete shoes having toe-calks is iinished at one revolution of the rolls. The advantages of the present construction are, first, the bar is gradually reduced and made to approximate its final shape with only a few operations by being run through the T-passes; second, the central disposition of the calli-forming pockets insures the formation of the calks along the central axis of the bar, thereby preventing elongation of the bar on one side and distortion on the other side, which is the diliiculty experienced with those rolls having the. recesses at the side of the pass, and also leaves ample metal at the sides for the raising of a lip after the bar has been completed and insures a straight and even delivery ofthe bar; third, theY novel shape of the finishing-pass in the lower roll causes the taper or-bevel to be formed ou the bar for the useful purpose of preventing in-A jury to the hoof by the, complete shoe, and, fourth, the final reduction of the bar, the forming of the calks thereon, and the beveling and finishing are all accomplished iu one pass.

I am aware that T-passes have been ein; ployed heretofore in rolls and that pockets ing a collar received in the pass, which has calk-forming pockets or recesses disposed in the plane of the center line of the pass, Whereby the finished bar is provided with calks along its central axis on its Hat side and is provided With a. longitudinallyextending bevel occupying half its Width on its opposite side.

In testimony whereof I affix my signature in presence of two witnesses.

EMANUEL BUMFORD. Vitnesses:

A. T. SHELDoN, JOHN CARR. 

